Impact from Thailand Flood (Details) (Natural Disasters and Other Casualty Events, USD $) In Millions, unless otherwise specified	1 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Natural Disasters and Other Casualty Events
Insurance Recoveries, To Date
Insurance proceeds payment, from contract manufacturer	$ 14.8	$ 4.2
Insurance proceeds payment, from contract manufacturer, forgiveness of capital lease obligations	3.4	2.2
Insurance proceeds payment, from contract manufacturer, outstanding payables	3.2	2.0
Insurance proceeds payment, from contract manufacturer, receivable	$ 8.2